sensory gbs

My father has sensory gbs, it has been 3 long years for us what an evil syndrome, we have gone through so much, we are hoping recovery comes soon . I was told sensory damage takes longer to recover than motor damage. From the research i have done, sensory is not that common. If you dont mind me asking, what pain medication were you prescribed? Do you also get those sharp stabbing sensations? I heard this is the nerve regenerating , i dont know if that is entirely true do you?